21033232210 has 8 divisors (see below), whose sum is σ = 37859817996. Its totient is φ = 8413292880.

The previous prime is 21033232193. The next prime is 21033232223. The reversal of 21033232210 is 1223233012.

It can be written as a sum of positive squares in 2 ways, for example, as 21019490361 + 13741849 = 144981^2 + 3707^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051661601 + ... + 1051661620.

Almost surely, 2^21033232210 is an apocalyptic number.

21033232210 is a deficient number, since it is larger than the sum of its proper divisors (16826585786).

21033232210 is a wasteful number, since it uses less digits than its factorization.

21033232210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103323228.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21033232210 its reverse (1223233012), we get a palindrome (22256465222).

The spelling of 21033232210 in words is "twenty-one billion, thirty-three million, two hundred thirty-two thousand, two hundred ten".